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Using new data on roll-call voting of US state legislators and public opinion in their districts, we explain how ideological polarization of voters within districts can lead to legislative polarization. In so-called "moderate" districts that switch hands between parties, legislative behavior is shaped by the fact that voters are often quite heterogeneous: the ideological distance between Democrats and Republicans within these districts is often greater than the distance between liberal cities and conservative rural areas. We root this intuition in a formal model that associates intradistrict ideological heterogeneity with uncertainty about the ideological location of the median voter. We then demonstrate that among districts with similar median voter ideologies, the difference in legislative behavior between Democratic and Republican state legislators is greater in more ideologically heterogeneous districts. Our findings suggest that accounting for the subtleties of political geography can help explain the coexistence of polarized legislators and a mass public that appears to contain many moderates.

Across the medical and social sciences, new discussions about replication have led to transformations in research practice. Sociologists, however, have been largely absent from these discussions. The goals of this review are to introduce sociologists to these developments, synthesize insights from science studies about replication in general, and detail the specific issues regarding replication that occur in sociology. The first half of the article argues that a sociologically sophisticated understanding of replication must address both the ways that replication rules and conventions evolved within an epistemic culture and how those cultures are shaped by specific research challenges. The second half outlines the four main dimensions of replicability in quantitative sociology—verifiability, robustness, repeatability, and generalizability—and discusses the specific ambiguities of interpretation that can arise in each. We conclude by advocating some commonsense changes to promote replication while acknowledging the epistemic diversity of our field.

AbstractThis article concerns the proposal and testing of a Slovak version of the Ideological Consistency Scale, which is a 10-item scale originally developed by the Pew Research Centre (2017). Its psychometric properties are investigated on a Slovak sample (N = 101). Its fit to the Rasch model with conditional maximum likelihood is tested. The Slovak version of the scale is shown to be a reliable and useful instrument for measuring ideological attitudes. The ideological attitudes of the Slovak respondents are compared with those of the American sample. The results show that the political polarization in Slovakia is not strong: few Slovak respondents could be identified as being either consistently conservative or consistently liberal, and the majority exhibited mixed attitudes, tending slightly to display liberal opinions.